Dental surgical instrument



1. H. TAYLOR.

DENTAL SURGICAL INSTRUMENT.

APPucATmN man FEB.24,1921.

1,405,354, y Patented' Jan. 31, 1922.

narrano srargs rarest ortica.

JAMES H. TAYLOR', 'or owENsBono, KENTUCKY.`

nuiwrensu-Bernat4 INSTRUMENT.

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l Specification of Letters latent. i Patqgnfed Jan.

Applica-mourned February 24,1921. semina'lieaase.

To 'aZZ whom t 'may co'nfccm- I 3e it known that I, JAMES H TAYLOR, a citizen of the United States,4 residing at 'Gwensbormhin thecounty of Daviess and State or' Kentucky,` have invented certain new and useful Improvements in Dental Surgical Instruments, of which. the. following is a specication.

v- V'Ihis invention relates tov dental surgical instruments and more particularly to an instrument designed for usey in .the operation of cutting away the bony process in which a malerupted molar has become embedded,

, andthe general object of the invention is` to y provide an instrument which may be conveniently and eiectually employed for cutting away a growth of the 'bony process over one side of an impactedinferi'or molar at either side of the mouth.

Another objectv of the invention is to provide an instrument which may be conveniently manipulated without 4liability of injury to the patient and which will operate to smoothly cleave or cut away the portion of the bony process ot the inferior maxillary which has grown over the side of the malerupted molar and by the use of which instrument this portion of thebony process may by asingle operation becut away and removed leaving a smooth surface which will quickly heal. A Y

In the accompanying drawings:

Figure 1 is a top plan view O''one oi' the I instruments embodying the invention, the

view illustrating the manner in which the instrument is to be employed in cutting away the bony process embedding the outer side of the lower left third molar; v

Figure 2 is a similar view illustrating the instrument which is to be employed at the right hand side of the mouth for a like purose' p Figure 3 is a side elevation of the instrument shown in Figure 1;

Figure et is a front end elevation of t-he instrument, a portion of the jaws being shown in section.

The instruments shown in Figures 1 and 2 of the drawings are structurally identical, the only difference being that one is adapted for use at the left hand side of the mouth and the other at the right hand side of the mouth, and therefore the specific description Ywhich is to follow will apply equally well to both instruments.

The instrument in either case .comprises a 'and longitudinally pair of members one indicatedbythenumeral 1 and the other by thenumeral- 2, vwhich members are disposed in crossed relation at their forward portions and vvconnected by-means of a. pivot'screw Sgtlre lmembers 1 and 2 being provided with handle portions ,tand 5 yrespectively which' maybe i knurled andr suitably shaped to provide for most convenient manipulation of the instrument.

F orwardly beyond the .pivot 3, the meinber l is provided laterally as indicated by the numeral '6, and thence downwardly 'and laterally inwardly to` provide a blade which vis indicated in general by the numeral 7. The outer side of this blade is transversely curved and smooth throughout, as indicated by they numeral 8, whereas the inwardlypresented side ofthe bladeV is transversely and longitudinally cupped or concaved", as indicated by the 'nu meral 9, so asr toprovidevan'approximately elliptical cutting edge V10 extendingcon` the blade 7.

' The member 2 -forwardly beyond kthe vpivot 3 is extended outwardly laterally, as -atlll, and thence downwardly and laterally .inwardly to provide a-` gripping jaw-indicated by the numeralv 12, 'this having' a concave inwardly presented ifface 13 Awhichfaces a concavity' 9: of the blad'ey 71. IfIo-weventhe concave face `of the blade' is presented inwardly and upwardly at an angle and the gripping face of the jaw is presented downwardly and inwardly at an angle and .the jaw 12 is considerably shorterthan the blade T. Likewise the blade is offset forwardly with relation to the jaw l2 as best illustrated in Figures l, 2 and 3 of the drawings. The reason for this relative arrangement of the blades will be made apparent from the description off the use of is to follow.

By reference to Figure 1, which ligure illustrates vthe manner of using one of the instruments, it will 'be observed that the the instrument which molar A is malerupted and that as a result of the maleruption a Vportion B of the inferior maxillary Cl` has grown over the outer Y side of the molar, this being thelower left third molar. vIn order to permit of thisy embedded molarV Ibeing lifted from its impressionin the inferior maXillary, it is nec essary that the portion B of the bony process be cut away and` this is accomplished by ,i

the uses of the instrument shown in Figure l, the instrument shown in Figure 2 being employed where a similar condition exists in the lower right third molar. In the use of the instrument the same is so disposed that the concave face 13 of the jaw l2 will be brought to bear against the inner side of the molar A immediately above the process, the jaws of the instrument straddling the molar and the blade 7, by reason of its greater length extending downwardly beside the process which has overgrown the outer side of the molar. Pressure is then brought to bear against the handle member l whereupon the blade 7 will be swung or closed in the direction of the jaw l2 and its cutting edge will be caused to cut through or cleave the bony process which embeds the outer side of the said molar. By reference to Figure i of the drawings it will be observed that the :tace ot the jaw l2 engaged the tooth immediately above the process or in other words engages against one side of the crown of the tooth whereas the cutting portion of the blade 7 projects downwardly below the jaw to such a` distance that its lower extremity is located at a point justabove the lower end of the root of the mal-erupted tooth so that when the handle members of the instrument are closed, the cutting edge of the blade will cleave through the overgrown process. Other conditions being normal, the combined action of the blade 7 and jaw l2 upon the tooth will tend to tilt the tooth and partly dislodge the same.

Y If the bony process has grown about the g inner side of the molar instead of about the outer side thereof, the instrument may be employed in a reverse manner or in other .words the instrument which is employed in Figure l at the left side of the mouth would under these conditions be employed at the right side of the mouth, and the instrument shown in Figure 2 would be employed at the left side ot the mouth taking the place of the instrument illust-rated in Figure l. c

it may be employed in the precise form illustrated or with slight modification, in releasing all other inferior teeth which may be malerupted or impacted, or malformed.

Having thus described the invention, what is claimed as new'is:

l. A dental surgical instrument comprising a pair of pivoted members, a jaw carried by one of the members to engage one side of a. tooth crown, and a blade carried by the other member and extending opposite the said j aw and of greater length than the jaw and having its outer portion provided with a cutting edge, the said blade being offset forwardly with relation to the jaw.

2. A dental surgical instrument comprising a pair of pivoted members, a j aw carried by one vofthe members to engage one side of a tooth crown, and a blade carried-'by the other member and extending opposite the said jaw and of greater length than the jaw and having its outer portion provided with a cutting edge, the j aw having its engaging faces presented laterally inwardly and downwardly, and the blade having its cutting portion presented laterally inwardly and upwardly.

In testimony whereof I affix my signature.

JAMES H. TAYLOR. [n s] 

